Retina displays at arms length is one thing, but 60" and you'll have to be seated at least ten feet back. And I've found that most people can't tell 720 vs 1080 at 15 feet. Same thing about audio systems. As long as you're synchronized you can't improve the sound by pouring money into the system. I figure there's a serious plateau of diminishing returns around the thousand dollar mark.

Now, a 60" 4k computer monitor at just over arms length, that might kick ass.